Dump-car.



F. W. HUBBARD.

DUMP GAR. APPLICATION FILED AUGJB, 1910.

Patented June 11, 1912.

3 SHEETS-SHEET 1.

P. W. HUBBARD.

DUMP GAR.

APPLICATION FILED AUG, 18, 1910.

Patented June 11, 1912.

3 SHEETSSHBET 2.

awa- 5 K mm 1. W a w 5. a/Za'n/ COLUMBIA PLANOGRAPH C0.. WASHINGTON. D.c.

P. W. HUBBARD.

4 DUMP CAR. 1 APPLICATION YILED AUG. 18, 1910.

Patented June 11, 1912.

3 SHEETS-SHEET 3.

INVENTOR.

ITED STATES PATENT OFFICE.

FRED W. HUBBARD, 0F COLUMBUS, OHIO, ASSIGNOR TO THE KILBOURNE AND JACOBSMANUFACTURING COMPANY, OF COLUMBUS, OHIO, A CORPORATION OF OHIO.

DUMP-CAR.

Specification of Letters Patent.

Patented June 11, 1912.

To all whom it may concern:

Be it known that I, FRED W. HUBBARD, a citizen of the United States,residing at C0- lumbus, in the county of Franklin and State of Ohio,have invented certain new and useful Improvements in Dump-Cars, of whichthe following is a specification.

This invention relates to improvements in dump cars and has specialreference to the style of dump car shown in the drawings of applicationSerialNo. 511,662, for Letters Patent of the United States, filed August6, 1909, for improvements in dump car look, by Messrs. Stensill, Doty,and Hubbard.

The improvement made herein is necessitated by the conditions underwhich the car is frequently operated. KVhere the dumping is to be donealong a trackway embedded in the earth or resting on the earth, nodetrimental results are experienced, but where the dumping takes placeon a trestle or other overhead structure, the impact of the car bedagainst the underframe whenthe car is dumped, violently shocks thetrestle structure, and in a short time weakens it materially. It will beseen that in a long car carrying from twenty-five to thirty-five tons ofearth or other matter when dumped through the distance that cars of thisstyle are operated, the stress set up by the impact of the dumping carbed will necessarily be very great.

The purpose of this invention is to modify the construction andoperation of the car dumping means shown in the said application so astocushion the car bed in its dumping, permitting the side which islowered in dumping to fall normally almost to the limit and there checkit by means of ciently carry out the dumping operation. The constructionto accomplish these purposes will be hereinafter set forth and embodiedin the claims.

In the drawings which are hereto attached and hereby made a part of thisspecification-Figure 1 is a transverse vertical section of a car havingthe dumping and the cushioning means shown thereon; Fig. 2 is a viewfrom the left in Fig. 1 showing in detail parts of the dumping devicesleft after the removal of certain parts, and slight modifications toadapt the same to the cushioning function. Fig. 3 is a top View of theshowing in Fig. 2, the members 17 hereafter mentioned being in dottedlines to show their positions merely, said members being removed, asstated above in reference to Fig. 2. Fig. 1 is a perspective view of oneside of the center sill of said car having the locking and "controllingdevices thereon.

Referring to the drawings, 1 is a carbed pivoted at 2 on the underframeconstruct-ion shown generally at 3, and at/l is shown an air cylindercontaining the arm 5 carried upon the upper end of the piston rod. The

upper end of the arm is notched at 6 so as.

to engage the shoulder 7 on the bracket member 8, which is secured tothe underside of the car bed. The arm 5 is adapted to engage theshoulder 7 to dump the car toward the left asshown in Fig. 1. When it isintended to dump the car to the right, as shown in Fig. 1, the arm 5 maybe removed (it not being deemed necessary to show and describe in detaila construction permitting this removal, since it is easily formed) andis placed on the piston rod in air cylinder 10 on the opposite side ofthe car, arm 12 having first been removed therefrom. When arm =5 is thuslocated on the left side of the car, as shown in Fig. 1, it is in properposition to dump the car to the right, the notch 6 engaging the shoulder7 formed on the bracket member 141. When arm 5 is transposed to the leftside, arm 12 is transposed to the right side, and the function of saidarm 12 will be hereinafter described; said arm 12 at its upper end isrounded some what so as to pass by the shoulder 7 a and engage the notch13, or when said arm 12 is positioned on the opposite side of the car,it

inc

derframe of the car; a bracket is provided on the center sill 21,furnishing a bearing for the shaft 19 at one end, and a similar bearingis provided at the other end; (not shown) said shaft 19 has looselymounted thereon the cam members 22, 23, between which is adapted toextend the arm 5 or 12 mounted on the'piston, and which carries pins onits opposite sides, one being shown at 241, for engaging the faces 25and 26 of said cams 22 and 23. When the pistonarm is lifted, the cammembers are rotated on the shaft 19 as a pivot, and consequently, theshaft is not operated thereby. It is necessary however to operate theshaft, and for that purpose a pin is provided on each of the said cammembers 22, 23, one pin being shown at 27, and a latch 17, pivotallymounted at 28, has a rigid arm 29 weighted at 30, whereby the latch iskept in engaging position with said pin.

It is seen that the upward movement of the piston arm 5 or 12 will setup a rotary movement of the cam members 22, 23, which will carry thelatch 17 upwardly, thereby rotating the shaft 19 through the crank arm29 The effect of this rotation of the shaft is to lift the arm 30, andthereby the pivoted link member 31 connected by the pin '32 with alocking member 33. Roller 34 mounted at the end of the locking member 33engages the shoulder 35 formed on the locking band 36, and when theshaft 19 is rotated, as described, the roller 34 is lifted out ofengagement with the shoulder 35, whereby the car bed 1 is free to bedumped. The effect of moving the piston upwardly is therefore to unlockthe car bed, and if it is desired to operate the piston withoutaffecting the locking devices, the latch 17 may be removed, whereuponthe outward movement of the piston arm will lift the cams 22, 23, whichare free to rotate on the shaft 19, and thereby the shaft is notdisturbed. In Fig. 1 the latch 17 is shown on one side of the car andomitted on the other side, so that the piston arm 12 may be movedwithout in any way affecting the locking of the car. This is done for apurpose hereinafter described.

Assuming that the car'is loaded, and the bed and other parts are intheir normal po sition, and it is desired to dump toward the left sideas shown in Fig. 1; arm 12, by the introduction of air into the cylinder10 through the construction shown generally at 11 is elevated intoengagement with the notch 13, in the bracket 14:. The volume of airadmitted to the cylinder 10 is just sufficient to lift the arm 12 tothis position, and the greater part thereof will remain in the cylinder.Immediately after the arm 12 has been thus positioned, the car is dumpedby forcing the arm 5 into 'contact with the shoulder 7, and as the carbed tilts, the arm 12is quickly forced downwardly, compressing the .a1r1n cylinder 10 to a small volume.

The magnitude of this volume will be determined by the degree of openingof the exhaust valve 15 in the pipe 16, the adjustment of said valvebeing such that enough air will remain under compression to cushionthe'car bed and relieve t-he'underframe of the car and the trestle fromthe shock and stress incident to the dumping. The air in cylinder 10will not bring the car bed to a decided pause until the tilting hasproceeded sufliciently to cause the lading to begin to move so that thedumping operation will be assured. The air under compression in cylinder1O gradually escapes, permitting the arm 12 to descend, and the car bedthereb reaches its lowest tilted position. In this manner the lading isthoroughly discharged and both the car and the trestle upon which itstands are protected against undue shocks and stresses. If it be desiredto dump the car in the opposite direction as shown in Fig. 1, arms 12and 5 are transposed and latch 17 is transferred to the opposite side ofthe car also. It is apparent that the piston arm 5 when moved upwardlywill cause the car bed to be unlocked in the position shown in Fig. 1,but that the piston arm 12 when moved upwardly, does not in any manneraffect the locking of the car bed; this is essential, for the car mustremain locked until the dumping operation is about to begin and thenmust be unlocked by the piston which effects the dumping. It is readilyseen that, if the car bed were unlocked by the upward movement of thepiston arm 12 as shown in Fig. 1, if the car were more heavily laden onthe opposite side, dumping toward that side would immediately takeplace, to the serious injury of the car.

The construction of the parts is such that the transposition of pistonarms is easily effected and the transfer of the latch can readily bemade.

What I claim is:

1. In a dump car, an air cylinder, a piston rod therein adapted toengage the car bed to dump the same, a second air cylinder, a piston rodtherein adapted to be elevated into engagement with the car bed, the airthus lifting the said last mentioned piston rod being retained in saidcylinder in suficient volume to cushion the car bed in its dumpingoperation. I

2. In a dump car, an air cylinder, a piston rod therein adapted toengage the car bed to dump the same, a second air cylinder on the sideon which said second cylinder is loopposite side ofsaid car, a pistonrod therecated. 10 in adapted to be elevated into engagement Intestimony whereof I aflix my signature with the car bed before thedumping operain the presence of two witnesses.

tion begins, the air thus lifting said last FRED WV. HUBBARD. mentionedpiston rod being retained in said WVitnesses:

cylinder in sufficient volume to cushion the F. R. AGKLAND,

car bed in its dumping movement toward the F. A. JACOBS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. C.

